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Understanding Relays: The Unsung Heroes of Electrical and Automation Systems
Relays are fundamental components in the world of electrical and electronic engineering. Although small in size, they perform critical tasks that ensure the safe, efficient, and automated functioning of countless systems — from home appliances and industrial machines to automotive electronics and power grids. This blog explores the role of relays, their types, working principles, and their growing significance in modern automation and smart technologies.
What is a Relay?
A relay is an electromechanical or solid-state switch that uses a low-power signal to control a high-power circuit. Simply put, it acts as a bridge that opens or closes contacts in another circuit when it receives an electrical input signal. The purpose is to allow the control of large electrical loads using minimal input energy, ensuring safety, isolation, and automation.
Types of Relays
Electromechanical Relay (EMR):
These relays operate using an electromagnet. When current flows through the coil, it creates …